The X-ONE BIPHASE string is the best performing string in this range on the 3 criteria of playability, durability and integrity. The special feature of this range is the wear indicator, which allows the player to change the string before it breaks completely. This indicator is manifested by the significant fraying of the string at the point of impact of the ball.

These strings are renowned and appreciated for their power, their comfort and their strong capacity to preserve their qualities over time.

• Main material: Polyamide, polyurethane, silicone finish.
• Not recommended for heavy string breakers (< 10 hours of play).
• String made in France.
• PU 400: 400% elasticity for great comfort and dynamic performance. Elastyl® fibres (50%): +12% elasticity compared to a standard PA. Provides enormous elasticity for maximum power.
• H²C Fibres (50%): Maximises performance with high temperature fibres for better tensile strength.
• Biphase Process: Exclusive "pre-stretch" process to provide better tensile strength and life. Visible and noticeable on the string, it increases the spin.